Transient Stability Improvement by D-FACTS Devices with Auxiliary Neuro- Controller

Abstract

The distributed flexible ac- transmission system (D-FACTS) is a recently developed FACTS technology. Distributed static series compensator (DSSC) operates using the D-FACTS concept, which is to use multiple small-size single-phase converters instead of the one large-size three-phase series converter in the static synchronous series compensator (SSSC). Also, the DSSC has fewer prices with more capabilities. It places in transmission lines in a distributed method. This paper presents the application of artificial neural network (ANN) controller in DSSC auxiliary controller to improve transient stability in a two-machine, two-area power system. The simulations have been carried out using Matlab/Simulink and it verified DSSC based auxiliary ANN controller offers improved transient performance over the auxiliary classic controller used by the DSSC over a wide range of system operating condition.